<template>
  <div>
    <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="AddRoleDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 主题内容区域 -->
      <el-table :data="rolelist" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1 ===0 ? 'bdtop' : '','vcenter']"
                     v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable
                            @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <el-row :class="[i2 ===0 ? '' : 'bdtop','vcenter']"  v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable
                            @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" 
                            v-for="item3 in item2.children" 
                            :key="item3.id"
                            closable
                            @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" 
                       @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini"
                       @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini"
                       @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
<!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed">
  <el-tree :data="rightslist" 
           :props="treeProps" 
           show-checkbox 
           node-key="id"
           default-expand-all
           :default-checked-keys="defKeys"
           ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>
    <!-- 编辑用户角色对话框 -->
    <el-dialog
      title="编辑角色"
      :visible.sync="editRoleDialogVisible"
      width="50%">
      <el-form :model="editRoleForm"
               ref="editRoleFormRef"
               :rules="editRoleFormRules"
               label-width="100px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prom="roleDesc">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoles">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 添加角色对话框 -->
     <el-dialog
      title="添加角色"
      :visible.sync="AddRoleDialogVisible"
      width="40%"
      @close="addRoleDialogClosed"
    >
      <el-form
        :model="addRoleForm"
        ref="addRoleFormRef"
        :rules="addRoleFormRules"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="AddRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>
    </div>
  </div>
</template>

<script>
export default {
  created() {
    this.getRolesList()
  },
  data() {
    return {
      rolelist:[],
      setRightDialogVisible:false,
      rightslist:[],
      treeProps:{
        label:'authName',
        children:'children',
      },
      defKeys:[],
      // 即将分配权限的角色ID
      roleId:'',
      editRoleDialogVisible:false,
      editRoleForm:{},
      editRoleFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      addRoleFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          {
            min: 2,
            max: 10,
            message: '角色名称的长度在2～10个字',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          {
            min: 0,
            max: 20,
            message: '角色描述的长度在0～20个字',
            trigger: 'blur'
          }
        ],
      },
      addRoleForm:{},
      AddRoleDialogVisible:false
    }
  },
  methods: {
    async getRolesList(){
      const {data: res} =await this.$http.get('roles')
      if(res.meta.status !==200){
        return this.$message.error('获取角色列表失败！')
      }
      this.rolelist = res.data
    },
    async removeRightById(role, rightId){
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户及信息, 是否继续?', '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => {return err})
        // 此时点取消或者删除按钮会返回对应的字符串cancel、confirm
        // 可以通过判断此时拿到结果是否等于字符串判断取消或者删除
        if(confirmResult !== 'confirm'){
          return this.$message.info('已取消删除')
        }
        const{data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if(res.meta.status !== 200){
          return this.$message.error('删除权限失败！')
        }
        role.children = res.data
    },
    // 获取权限列表的数据
    async showSetRightDialog(role){
      this.roleId = role.id
      const{data: res} =await this.$http.get('rights/tree')
      if(res.meta.status !== 200){
        return this.$$message.error('获取权限数据失败！')
      }
      this.rightslist = res.data
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归获取三级权限的id并保存到defKeys里
    getLeafKeys(node, arr){
      if(!node.children){
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    setRightDialogClosed(){
      this.defKeys = []
    },
    async allotRights(){
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]
      const idStr = keys.join(',')
      const {data: res} =await this.$http.post(`roles/${this.roleId}/rights`,{
        rids:idStr
      })
      if(res.meta.status !==200){
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
    async showEditDialog(id){
     const {data: res} = await this.$http.get('roles/' + id)
      if(res.meta.status !==200){
        return this.$message.error('编辑角色信息失败')
      }
      this.editRoleForm = res.data
      this.editRoleDialogVisible = true
    },
    editRoles(){
      this.$refs.editRoleFormRef.validate(async valid => {
        // console.log(valid)
        // 表单预校验失败
        if (!valid) return
        const { data: res } = await this.$http.put(
          'roles/' + this.editRoleForm.roleId,
          {
            roleName: this.editRoleForm.roleName,
            roleDesc: this.editRoleForm.roleDesc
          }
        )
        if (res.meta.status !== 200) {
          this.$message.error('更新角色信息失败！')
        }
        // 隐藏编辑角色对话框
        this.editRoleDialogVisible = false
        this.$message.success('更新角色信息成功！')
        this.getRolesList()
      })
    },
    addRoleDialogClosed() {
      this.$refs.addRoleFormRef.resetFields()
    },
      addRoles() {
      this.$refs.addRoleFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('roles', this.addRoleForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败！')
        }
        this.$message.success('添加角色成功！')
        this.AddRoleDialogVisible = false
        this.getRolesList()
      })
    },
    async removeRoleById(id){
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除角色失败！')
      this.$message.success('删除用户成功！')
      this.getRolesList()
    }
  },
}
</script>

<style lang="less" scoped>
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>